A297332 Number of n X n 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 0 or 2 neighboring 1's.

2, 8, 96, 2119, 130297, 16277492, 5193690642, 3603917287497, 6073485212079264, 23075270570489849128, 207672501598695910705310, 4285665784382445160009080062, 207135689108669020537324268900868

Offset

1,1

Comments

Diagonal of A297338.

Links

R. H. Hardin, Table of n, a(n) for n = 1..19

Example

Some solutions for n=5
..1..0..0..0..1. .1..0..0..0..1. .0..0..1..0..0. .0..0..0..0..1
..1..0..0..0..1. .0..0..0..0..0. .0..0..0..0..0. .0..0..1..0..1
..0..0..0..0..0. .1..0..0..1..1. .1..0..1..1..0. .0..0..0..0..1
..0..0..1..0..0. .1..0..1..1..0. .0..1..1..0..1. .1..0..1..0..1
..1..0..0..0..0. .1..0..0..0..1. .0..0..1..0..0. .0..0..1..0..1

Crossrefs

Cf. A297338.

Sequence in context: A052713 A136797 A255132 * A009752 A322736 A137704

Adjacent sequences: A297329 A297330 A297331 * A297333 A297334 A297335

Keyword

nonn

Author

R. H. Hardin, Dec 28 2017

Status

approved